ntpd confusion

[mad <mad@sharktooth.de>]

Hi!

I'm stumped. On my home network all my Debian installations _only_ use
the router as clock source.

# ntpq -p
remote          refid    st t when poll reach   delay   offset  jitter
========================================================================
fritz.box       X.Y.Z.A   3 u    -   64    1    1.874    0.153   0.052

I use the default ntp configuration and other Debian installations
"directly on the internet" use all four clock sources
(0.debian.pool...., 1.debian.pool...).

Why is that? It seems to have something to do with IPv4 and IPv6. If I
start ntpd with '-4 -n' ntpq exists with 'Connection refused'. If I
start it with '-6 -n' ntpq says 'No association ID's returned'.

I'm thoroughly confused.

Does anyone knows what's happening?

TIA
mad